05-06-2017, 07:03 PM
The attachment shows the vision demodulator and amplifier stages of the HMV 1804 and Marconi VT50.
Negative grid bias for the video amplifier valve is derived from the voltage drop across potentiometer VR2 which is connected in series with the HT negative return.
Geordie McBoyne.
Negative grid bias for the video amplifier valve is derived from the voltage drop across potentiometer VR2 which is connected in series with the HT negative return.
Geordie McBoyne.
